Electronics Forum | Fri Jan 24 19:49:40 EST 2003 | jonfox
QSA series was a joint project, but Quad machines still use feeders made by Samsung, or Samsung makes the feeders Quad designed (whatever). QSoft has two different evolutions, Qsoft(1) went to Samsung, and Qsoft(2) stayed with Quad. I'm sure they h
Electronics Forum | Fri Jan 17 09:38:20 EST 2003 | Grant Petty
Hi, We have a BGA that uses .4mm diameter PCB pads on the BGA itself, however we have decided to use .5mm pads on the PCB, to help paste release from the stencil. Is this a bad thing, having different size pads on the PCB compared to the BGA itself
Electronics Forum | Tue Jan 21 10:47:22 EST 2003 | MA/NY DDave
Hi Some companies invest in full ESD protection. Some even have ESD Officiers / Engineers. Floor, Wrist Straps, Foot Straps, Special Shoes, Log in Books, Ionizers inside machines, etc, and training. These are in addition to just the reel and it's
Electronics Forum | Mon Jan 20 19:07:41 EST 2003 | slthomas
Sorry, what I meant was that they don't provide a duration for that liquidus + 20�C value that I've seen bantered about here and on TechNet. They only provide the same stock time above liquidus of 30-90 that they've always used. I'd like to see refe
Electronics Forum | Tue Jan 21 11:11:07 EST 2003 | slthomas
OK, so the issue is with the variability of the alloys on the soldering surfaces and the subsequent variability of reflow temps. Sounds reasonable (actually obvious, now that I think about it), especially on the component side. We only use HASL fin
Electronics Forum | Wed Jan 22 15:50:23 EST 2003 | davef
Some people run underfill through their reflow oven set with a normal recipe, but at breakneck speed. We think that might not produce the cure that we'd like to obtain. We'd don't use our reflow oven because we don't want to given-up the time to
Electronics Forum | Wed Jan 22 13:31:23 EST 2003 | jonfox
Elongated slots!! Our older runs are a pain sometimes with parts (1206, 0805 chips) twisting as they go through cure. I'm sure that its not all due to the dots, but I'm sure that it doesn't help either. We don't see this effect on our runs that us
Electronics Forum | Fri Jan 24 17:53:42 EST 2003 | razan3
Chipbonder is best applied with a stencil. Too bad on the dispenser purchase. Little hint, use a Kapton Stencil. You can have them laser cut and can get them as thick as you want. Another advantage is the ability to make shapes etc for cleaning
Electronics Forum | Fri Jan 24 21:54:36 EST 2003 | jonfox
Good comment about the "passthrough" CAMALOT. I like that one. About the beer...when I was in field service, I was a microbrew nut, and still one of my favorites is Fat Tire from the Boulder, CO area. honorable mentions out West are (yes) Pyramid
Electronics Forum | Wed Jan 22 16:06:33 EST 2003 | peterson
We are considering purchasing a Nitrogen generator rather than using a separate nitrogen tank outside the building. Here are my questions: 1. Has anyone out there used one before? Our model comes from Tamura and is priced around 50K 2. Would there be